> Does that sound like a plan? If so, please let me know by reply (or email me: sleeping [at sign] myperch.org) since it's something I'm going to be doing anyway, so I might as well make it useful.

It would be difficult to plan the game for a specific Grade since curriculums are different in every school board. However, you want to keep in mind that the players would likely be 8-12 so the reading level and logic puzzles would have to be accessible for these players. Of course, the teacher would have the solution to assist students.

An interesting twist would be to make the puzzle questions random. So, if opening the door involved solving a math problem, the problem could be different for each player (to force them to solve it vs. asking their friend).